1 files changed, 337 insertions, 0 deletions
diff --git a/src/core/hle/service/cmif_serialization.h b/src/core/hle/service/cmif_serialization.h
new file mode 100644
index 000000000..8e8cf2507
--- /dev/null
+++ b/src/core/hle/service/cmif_serialization.h
@@ -0,0 +1,337 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "common/div_ceil.h"
+
+#include "core/hle/service/cmif_types.h"
+#include "core/hle/service/ipc_helpers.h"
+#include "core/hle/service/service.h"
+
+namespace Service {
+
+// clang-format off
+struct RequestLayout {
+    u32 copy_handle_count;
+    u32 move_handle_count;
+    u32 cmif_raw_data_size;
+    u32 domain_interface_count;
+};
+
+template <ArgumentType Type1, ArgumentType Type2, typename MethodArguments, size_t PrevAlign = 1, size_t DataOffset = 0, size_t ArgIndex = 0>
+constexpr u32 GetArgumentRawDataSize() {
+    if constexpr (ArgIndex >= std::tuple_size_v<MethodArguments>) {
+        return static_cast<u32>(DataOffset);
+    } else {
+        using ArgType = std::tuple_element_t<ArgIndex, MethodArguments>;
+
+        if constexpr (ArgumentTraits<ArgType>::Type == Type1 || ArgumentTraits<ArgType>::Type == Type2) {
+            constexpr size_t ArgAlign = alignof(ArgType);
+            constexpr size_t ArgSize = sizeof(ArgType);
+
+            static_assert(PrevAlign <= ArgAlign, "Input argument is not ordered by alignment");
+
+            constexpr size_t ArgOffset = Common::AlignUp(DataOffset, ArgAlign);
+            constexpr size_t ArgEnd = ArgOffset + ArgSize;
+
+            return GetArgumentRawDataSize<Type1, Type2, MethodArguments, ArgAlign, ArgEnd, ArgIndex + 1>();
+        } else {
+            return GetArgumentRawDataSize<Type1, Type2, MethodArguments, PrevAlign, DataOffset, ArgIndex + 1>();
+        }
+    }
+}
+
+template <ArgumentType DataType, typename MethodArguments, size_t ArgCount = 0, size_t ArgIndex = 0>
+constexpr u32 GetArgumentTypeCount() {
+    if constexpr (ArgIndex >= std::tuple_size_v<MethodArguments>) {
+        return static_cast<u32>(ArgCount);
+    } else {
+        using ArgType = std::tuple_element_t<ArgIndex, MethodArguments>;
+
+        if constexpr (ArgumentTraits<ArgType>::Type == DataType) {
+            return GetArgumentTypeCount<DataType, MethodArguments, ArgCount + 1, ArgIndex + 1>();
+        } else {
+            return GetArgumentTypeCount<DataType, MethodArguments, ArgCount, ArgIndex + 1>();
+        }
+    }
+}
+
+template <typename MethodArguments>
+constexpr RequestLayout GetNonDomainReplyInLayout() {
+    return RequestLayout{
+        .copy_handle_count = GetArgumentTypeCount<ArgumentType::InCopyHandle, MethodArguments>(),
+        .move_handle_count = 0,
+        .cmif_raw_data_size = GetArgumentRawDataSize<ArgumentType::InData, ArgumentType::InProcessId, MethodArguments>(),
+        .domain_interface_count = 0,
+    };
+}
+
+template <typename MethodArguments>
+constexpr RequestLayout GetDomainReplyInLayout() {
+    return RequestLayout{
+        .copy_handle_count = GetArgumentTypeCount<ArgumentType::InCopyHandle, MethodArguments>(),
+        .move_handle_count = 0,
+        .cmif_raw_data_size = GetArgumentRawDataSize<ArgumentType::InData, ArgumentType::InProcessId, MethodArguments>(),
+        .domain_interface_count = GetArgumentTypeCount<ArgumentType::InInterface, MethodArguments>(),
+    };
+}
+
+template <typename MethodArguments>
+constexpr RequestLayout GetNonDomainReplyOutLayout() {
+    return RequestLayout{
+        .copy_handle_count = GetArgumentTypeCount<ArgumentType::OutCopyHandle, MethodArguments>(),
+        .move_handle_count = GetArgumentTypeCount<ArgumentType::OutMoveHandle, MethodArguments>() + GetArgumentTypeCount<ArgumentType::OutInterface, MethodArguments>(),
+        .cmif_raw_data_size = GetArgumentRawDataSize<ArgumentType::OutData, ArgumentType::OutData, MethodArguments>(),
+        .domain_interface_count = 0,
+    };
+}
+
+template <typename MethodArguments>
+constexpr RequestLayout GetDomainReplyOutLayout() {
+    return RequestLayout{
+        .copy_handle_count = GetArgumentTypeCount<ArgumentType::OutCopyHandle, MethodArguments>(),
+        .move_handle_count = GetArgumentTypeCount<ArgumentType::OutMoveHandle, MethodArguments>(),
+        .cmif_raw_data_size = GetArgumentRawDataSize<ArgumentType::OutData, ArgumentType::OutData, MethodArguments>(),
+        .domain_interface_count = GetArgumentTypeCount<ArgumentType::OutInterface, MethodArguments>(),
+    };
+}
+
+template <bool Domain, typename MethodArguments>
+constexpr RequestLayout GetReplyInLayout() {
+    return Domain ? GetDomainReplyInLayout<MethodArguments>() : GetNonDomainReplyInLayout<MethodArguments>();
+}
+
+template <bool Domain, typename MethodArguments>
+constexpr RequestLayout GetReplyOutLayout() {
+    return Domain ? GetDomainReplyOutLayout<MethodArguments>() : GetNonDomainReplyOutLayout<MethodArguments>();
+}
+
+using OutTemporaryBuffers = std::array<Common::ScratchBuffer<u8>, 3>;
+
+template <bool Domain, typename MethodArguments, typename CallArguments, size_t PrevAlign = 1, size_t DataOffset = 0, size_t HandleIndex = 0, size_t InBufferIndex = 0, size_t OutBufferIndex = 0, bool RawDataFinished = false, size_t ArgIndex = 0>
+void ReadInArgument(CallArguments& args, const u8* raw_data, HLERequestContext& ctx, OutTemporaryBuffers& temp) {
+    if constexpr (ArgIndex >= std::tuple_size_v<CallArguments>) {
+        return;
+    } else {
+        using ArgType = std::tuple_element_t<ArgIndex, MethodArguments>;
+
+        if constexpr (ArgumentTraits<ArgType>::Type == ArgumentType::InData || ArgumentTraits<ArgType>::Type == ArgumentType::InProcessId) {
+            constexpr size_t ArgAlign = alignof(ArgType);
+            constexpr size_t ArgSize = sizeof(ArgType);
+
+            static_assert(PrevAlign <= ArgAlign, "Input argument is not ordered by alignment");
+            static_assert(!RawDataFinished, "All input interface arguments must appear after raw data");
+
+            constexpr size_t ArgOffset = Common::AlignUp(DataOffset, ArgAlign);
+            constexpr size_t ArgEnd = ArgOffset + ArgSize;
+
+            if constexpr (ArgumentTraits<ArgType>::Type == ArgumentType::InProcessId) {
+                // TODO: abort parsing if PID is not provided?
+                // TODO: validate against raw data value?
+                std::get<ArgIndex>(args).pid = ctx.GetPID();
+            } else {
+                std::memcpy(&std::get<ArgIndex>(args), raw_data + ArgOffset, ArgSize);
+            }
+
+            return ReadInArgument<Domain, MethodArguments, CallArguments, ArgAlign, ArgEnd, HandleIndex, InBufferIndex, OutBufferIndex, false, ArgIndex + 1>(args, raw_data, ctx, temp);
+        } else if constexpr (ArgumentTraits<ArgType>::Type == ArgumentType::InInterface) {
+            constexpr size_t ArgAlign = alignof(u32);
+            constexpr size_t ArgSize = sizeof(u32);
+            constexpr size_t ArgOffset = Common::AlignUp(DataOffset, ArgAlign);
+            constexpr size_t ArgEnd = ArgOffset + ArgSize;
+
+            static_assert(Domain);
+            ASSERT(ctx.GetDomainMessageHeader().input_object_count > 0);
+
+            u32 value{};
+            std::memcpy(&value, raw_data + ArgOffset, ArgSize);
+            std::get<ArgIndex>(args) = ctx.GetDomainHandler<ArgType::Type>(value - 1);
+
+            return ReadInArgument<Domain, MethodArguments, CallArguments, ArgAlign, ArgEnd, HandleIndex, InBufferIndex, OutBufferIndex, true, ArgIndex + 1>(args, raw_data, ctx, temp);
+        } else if constexpr (ArgumentTraits<ArgType>::Type == ArgumentType::InCopyHandle) {
+            std::get<ArgIndex>(args) = std::move(ctx.GetObjectFromHandle<typename ArgType::Type>(ctx.GetCopyHandle(HandleIndex)));
+
+            return ReadInArgument<Domain, MethodArguments, CallArguments, PrevAlign, DataOffset, HandleIndex + 1, InBufferIndex, OutBufferIndex, RawDataFinished, ArgIndex + 1>(args, raw_data, ctx, temp);
+        } else if constexpr (ArgumentTraits<ArgType>::Type == ArgumentType::InLargeData) {
+            constexpr size_t BufferSize = sizeof(ArgType);
+
+            // Clear the existing data.
+            std::memset(&std::get<ArgIndex>(args), 0, BufferSize);
+
+            std::span<const u8> buffer{};
+
+            ASSERT(ctx.CanReadBuffer(InBufferIndex));
+            if constexpr (ArgType::Attr & BufferAttr_HipcAutoSelect) {
+                buffer = ctx.ReadBuffer(InBufferIndex);
+            } else if constexpr (ArgType::Attr & BufferAttr_HipcMapAlias) {
+                buffer = ctx.ReadBufferA(InBufferIndex);
+            } else /* if (ArgType::Attr & BufferAttr_HipcPointer) */ {
+                buffer = ctx.ReadBufferX(InBufferIndex);
+            }
+
+            std::memcpy(&std::get<ArgIndex>(args), buffer.data(), std::min(BufferSize, buffer.size()));
+
+            return ReadInArgument<Domain, MethodArguments, CallArguments, PrevAlign, DataOffset, HandleIndex, InBufferIndex + 1, OutBufferIndex, RawDataFinished, ArgIndex + 1>(args, raw_data, ctx, temp);
+        } else if constexpr (ArgumentTraits<ArgType>::Type == ArgumentType::InBuffer) {
+            using ElementType = typename ArgType::Type;
+
+            std::span<const u8> buffer{};
+
+            if (ctx.CanReadBuffer(InBufferIndex)) {
+                if constexpr (ArgType::Attr & BufferAttr_HipcAutoSelect) {
+                    buffer = ctx.ReadBuffer(InBufferIndex);
+                } else if constexpr (ArgType::Attr & BufferAttr_HipcMapAlias) {
+                    buffer = ctx.ReadBufferA(InBufferIndex);
+                } else /* if (ArgType::Attr & BufferAttr_HipcPointer) */ {
+                    buffer = ctx.ReadBufferX(InBufferIndex);
+                }
+            }
+
+            ElementType* ptr = (ElementType*) buffer.data();
+            size_t size = buffer.size() / sizeof(ElementType);
+
+            std::get<ArgIndex>(args) = std::span(ptr, size);
+
+            return ReadInArgument<Domain, MethodArguments, CallArguments, PrevAlign, DataOffset, HandleIndex, InBufferIndex + 1, OutBufferIndex, RawDataFinished, ArgIndex + 1>(args, raw_data, ctx, temp);
+        } else if constexpr (ArgumentTraits<ArgType>::Type == ArgumentType::OutLargeData) {
+            constexpr size_t BufferSize = sizeof(ArgType);
+
+            // Clear the existing data.
+            std::memset(&std::get<ArgIndex>(args), 0, BufferSize);
+
+            return ReadInArgument<Domain, MethodArguments, CallArguments, PrevAlign, DataOffset, HandleIndex, InBufferIndex, OutBufferIndex + 1, RawDataFinished, ArgIndex + 1>(args, raw_data, ctx, temp);
+        } else if constexpr (ArgumentTraits<ArgType>::Type == ArgumentType::OutBuffer) {
+            using ElementType = typename ArgType::Type;
+
+            // Set up scratch buffer.
+            auto& buffer = temp[OutBufferIndex];
+            if (ctx.CanWriteBuffer(OutBufferIndex)) {
+                buffer.resize_destructive(ctx.GetWriteBufferSize(OutBufferIndex));
+            } else {
+                buffer.resize_destructive(0);
+            }
+
+            ElementType* ptr = (ElementType*) buffer.data();
+            size_t size = buffer.size() / sizeof(ElementType);
+
+            std::get<ArgIndex>(args) = std::span(ptr, size);
+
+            return ReadInArgument<Domain, MethodArguments, CallArguments, PrevAlign, DataOffset, HandleIndex, InBufferIndex, OutBufferIndex + 1, RawDataFinished, ArgIndex + 1>(args, raw_data, ctx, temp);
+        } else {
+            return ReadInArgument<Domain, MethodArguments, CallArguments, PrevAlign, DataOffset, HandleIndex, InBufferIndex, OutBufferIndex, RawDataFinished, ArgIndex + 1>(args, raw_data, ctx, temp);
+        }
+    }
+}
+
+template <bool Domain, typename MethodArguments, typename CallArguments, size_t PrevAlign = 1, size_t DataOffset = 0, size_t OutBufferIndex = 0, bool RawDataFinished = false, size_t ArgIndex = 0>
+void WriteOutArgument(CallArguments& args, u8* raw_data, HLERequestContext& ctx, OutTemporaryBuffers& temp) {
+    if constexpr (ArgIndex >= std::tuple_size_v<CallArguments>) {
+        return;
+    } else {
+        using ArgType = std::tuple_element_t<ArgIndex, MethodArguments>;
+
+        if constexpr (ArgumentTraits<ArgType>::Type == ArgumentType::OutData) {
+            constexpr size_t ArgAlign = alignof(ArgType);
+            constexpr size_t ArgSize = sizeof(ArgType);
+
+            static_assert(PrevAlign <= ArgAlign, "Output argument is not ordered by alignment");
+            static_assert(!RawDataFinished, "All output interface arguments must appear after raw data");
+
+            constexpr size_t ArgOffset = Common::AlignUp(DataOffset, ArgAlign);
+            constexpr size_t ArgEnd = ArgOffset + ArgSize;
+
+            std::memcpy(raw_data + ArgOffset, &std::get<ArgIndex>(args), ArgSize);
+
+            return WriteOutArgument<Domain, MethodArguments, CallArguments, ArgAlign, ArgEnd, OutBufferIndex, false, ArgIndex + 1>(args, raw_data, ctx, temp);
+        } else if constexpr (ArgumentTraits<ArgType>::Type == ArgumentType::OutInterface) {
+            if constexpr (Domain) {
+                ctx.AddDomainObject(std::get<ArgIndex>(args));
+            } else {
+                ctx.AddMoveInterface(std::get<ArgIndex>(args));
+            }
+
+            return WriteOutArgument<Domain, MethodArguments, CallArguments, PrevAlign, DataOffset, OutBufferIndex, true, ArgIndex + 1>(args, raw_data, ctx, temp);
+        } else if constexpr (ArgumentTraits<ArgType>::Type == ArgumentType::OutCopyHandle) {
+            ctx.AddCopyObject(std::get<ArgIndex>(args).GetPointerUnsafe());
+
+            return WriteOutArgument<Domain, MethodArguments, CallArguments, PrevAlign, DataOffset, OutBufferIndex, RawDataFinished, ArgIndex + 1>(args, raw_data, ctx, temp);
+        } else if constexpr (ArgumentTraits<ArgType>::Type == ArgumentType::OutMoveHandle) {
+            ctx.AddMoveObject(std::get<ArgIndex>(args).GetPointerUnsafe());
+
+            return WriteOutArgument<Domain, MethodArguments, CallArguments, PrevAlign, DataOffset, OutBufferIndex, RawDataFinished, ArgIndex + 1>(args, raw_data, ctx, temp);
+        } else if constexpr (ArgumentTraits<ArgType>::Type == ArgumentType::OutLargeData) {
+            constexpr size_t BufferSize = sizeof(ArgType);
+
+            ASSERT(ctx.CanWriteBuffer(OutBufferIndex));
+            if constexpr (ArgType::Attr & BufferAttr_HipcAutoSelect) {
+                ctx.WriteBuffer(std::get<ArgIndex>(args), OutBufferIndex);
+            } else if constexpr (ArgType::Attr & BufferAttr_HipcMapAlias) {
+                ctx.WriteBufferB(&std::get<ArgIndex>(args), BufferSize, OutBufferIndex);
+            } else /* if (ArgType::Attr & BufferAttr_HipcPointer) */ {
+                ctx.WriteBufferC(&std::get<ArgIndex>(args), BufferSize, OutBufferIndex);
+            }
+
+            return WriteOutArgument<Domain, MethodArguments, CallArguments, PrevAlign, DataOffset, OutBufferIndex + 1, RawDataFinished, ArgIndex + 1>(args, raw_data, ctx, temp);
+        } else if constexpr (ArgumentTraits<ArgType>::Type == ArgumentType::OutBuffer) {
+            auto& buffer = temp[OutBufferIndex];
+            const size_t size = buffer.size();
+
+            if (ctx.CanWriteBuffer(OutBufferIndex)) {
+                if constexpr (ArgType::Attr & BufferAttr_HipcAutoSelect) {
+                    ctx.WriteBuffer(buffer.data(), size, OutBufferIndex);
+                } else if constexpr (ArgType::Attr & BufferAttr_HipcMapAlias) {
+                    ctx.WriteBufferB(buffer.data(), size, OutBufferIndex);
+                } else /* if (ArgType::Attr & BufferAttr_HipcPointer) */ {
+                    ctx.WriteBufferC(buffer.data(), size, OutBufferIndex);
+                }
+            }
+
+            return WriteOutArgument<Domain, MethodArguments, CallArguments, PrevAlign, DataOffset, OutBufferIndex + 1, RawDataFinished, ArgIndex + 1>( args, raw_data, ctx, temp);
+        } else {
+            return WriteOutArgument<Domain, MethodArguments, CallArguments, PrevAlign, DataOffset, OutBufferIndex, RawDataFinished, ArgIndex + 1>(args, raw_data, ctx, temp);
+        }
+    }
+}
+
+template <bool Domain, typename T, typename... A>
+void CmifReplyWrapImpl(HLERequestContext& ctx, T& t, Result (T::*f)(A...)) {
+    // Verify domain state.
+    if constexpr (Domain) {
+        ASSERT_MSG(ctx.GetManager()->IsDomain(), "Domain reply used on non-domain session");
+    } else {
+        ASSERT_MSG(!ctx.GetManager()->IsDomain(), "Non-domain reply used on domain session");
+    }
+
+    using MethodArguments = std::tuple<std::remove_reference_t<A>...>;
+
+    OutTemporaryBuffers buffers{};
+    auto call_arguments = std::tuple<typename RemoveOut<A>::Type...>();
+
+    // Read inputs.
+    const size_t offset_plus_command_id = ctx.GetDataPayloadOffset() + 2;
+    ReadInArgument<Domain, MethodArguments>(call_arguments, reinterpret_cast<u8*>(ctx.CommandBuffer() + offset_plus_command_id), ctx, buffers);
+
+    // Call.
+    const auto Callable = [&]<typename... CallArgs>(CallArgs&... args) {
+        return (t.*f)(args...);
+    };
+    const Result res = std::apply(Callable, call_arguments);
+
+    // Write result.
+    constexpr RequestLayout layout = GetReplyOutLayout<Domain, MethodArguments>();
+    IPC::ResponseBuilder rb{ctx, 2 + Common::DivCeil(layout.cmif_raw_data_size, sizeof(u32)), layout.copy_handle_count, layout.move_handle_count + layout.domain_interface_count};
+    rb.Push(res);
+
+    // Write out arguments.
+    WriteOutArgument<Domain, MethodArguments>(call_arguments, reinterpret_cast<u8*>(ctx.CommandBuffer() + rb.GetCurrentOffset()), ctx, buffers);
+}
+// clang-format on
+
+template <typename Self>
+template <bool Domain, auto F>
+inline void ServiceFramework<Self>::CmifReplyWrap(HLERequestContext& ctx) {
+    return CmifReplyWrapImpl<Domain>(ctx, *static_cast<Self*>(this), F);
+}
+
+} // namespace Service